First, I'd like to thank Andres for drawing my attention to this submission with his comment to last week's pick, linkzoom.

What addaxis provides is a way to overlay plots. Suppose you want to compare a set of curves. They share common units along the X axes
(ie, time) but their Y scales are different. Plotting them on the same axes may not be useful. Using a number of subplots
may be undesirable as well. Harry's solution might be something to consider.

This submission is a mini toolbox of functions. The example above uses addaxis, addaxislabel and addaxisplot. Just type "help addaxis" at the MATLAB command prompt. You might also check out his Readme.txt file to get started.

This type of plotting capability is very specialized which is reflected in his design approach. If it doesn't meet your exact
needs, just modify it. Sure beats starting from scratch!